Cost to Run a Tankless Electric Water Heater in Delaware
Delaware's average residential electricity rate is 18.5¢/kWh as of July 2026 — the 33rd cheapest in the country, 1% above the U.S. average. At typical usage (0.7 hours/day), a tankless electric water heater here costs $70.86 per month.
Per hour
$3.33
at 13,000–27,000 W
Per day
$2.33
0.7 hours/day
Per month
$70.86
383 kWh
Per year
$851
4,599 kWh
By usage level in Delaware
| Usage | Per day | Per month | Per year |
|---|---|---|---|
| Light (0.5 hrs/day) | $1.17 | $35.43 | $425 |
| Typical (0.7 hrs/day) | $2.33 | $70.86 | $851 |
| Heavy (1.4 hrs/day) | $4.66 | $142 | $1,702 |
Delaware vs. the rest of the country
Monthly cost at typical usage.
Frequently asked questions
How much does it cost to run a tankless electric water heater in Delaware?
At Delaware's current average residential rate of 18.5¢/kWh (July 2026), a tankless electric water heater with typical usage costs about $2.33 per day, $70.86 per month, or $851 per year.
Is running a tankless electric water heater in Delaware more expensive than average?
It's almost exactly the U.S. average: $70.86 per month here versus $70.10 nationally.
What does electricity cost in Delaware right now?
Delaware residents pay an average of 18.5¢ per kWh as of July 2026 — the 33rd cheapest rate of the 51 U.S. jurisdictions we track.